To work with the same service levels in multiple datacenters, and public cloud, use Abstract datastore tiers to group storage service levels, which are datastore tiers. See Manage datastore storage policies
You can then create limits for an enterprise in each storage service level. And you can bill customers for use of each tier across private and public cloud.
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You can display abstract datastore tiers on the dashboard, with usage and limits by enterprise. See Dashboard widgets. Note that the Abstract datastore tiers widget will display the abstract datastore tiers that are enabled and allowed to the enterprise, and also disabled tiers.
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